Commercially available

• Alba menstrualis (moss)
• Four Seasons White Moss
• Laffay's Perpetual White Moss
• Menstrualis muscosa alba
• Mousseuse perpétuelle
• Moussue des Quatre saisons blanc
• Perpetual White Moss
• Perpétuelle mousseuse
• Rose des Quatre Saisons blanc mousseux
• Rose des Quatre Saisons Mousseuse Blanche
• Rosier de Thionville

103 favorite votes.  
Average rating: GOOD+.  

White, near white or white blend Moss.
Registration name: Perpetual White Moss

Discovered by Unknown (before 1830).
Introduced in Australia by J. Graham & Co. in 1874 as 'Perpetual White Moss'.

Damask Perpetual, Moss.  

White.  Strong, centifolia, sweet fragrance.  Average diameter 2".  Medium, double (17-25 petals), in small clusters, flat bloom form.  Occasional repeat later in the season.  Glandular sepals, mossed buds.  

Medium, armed with thorns / prickles, bushy, upright.  Dark green foliage.  3 to 5 leaflets.  

Height: 4' to 5' (120 to 150cm).  Width: 3' (90cm).

USDA zone 5b and warmer.  Can be used for cut flower or garden.  

This rose was bred (or discovered) by an amateur in the vicinity of Thionville, Moselle, and sent to Pirolle (see authors), who distributed it to Vibert, Laffay, Sisley, Godefroy and other nurseries.
A study in 2006 showed that 'Quatre Saisons Blanc Mousseux' is genetically identical to 'Kazanlik' and 'York and Lancaster'.

Royall River Roses says this rose has long, elegant buds that open to semi-double, sweetly fragrant white blossoms. The buds and stems are covered in dense brownish green mossing...
For a definition of Perpetual Moss, see its entry in the Glossary...
In RoseGathering's photo, there's a bloom of 'Perpetual White Moss' Shown with 'Autumn Damask' sported on the same plant. What a great illustration of the two roses!